.imageviewer {
    float:center;
    text-align:center;
    
    border:solid 3px black;
}

.imageviewer .backcell {
    text-align:left;
}
.imageviewer .centercell {
    text-align:center;
}
.imageviewer .nextcell {
    text-align:right;
}

.imageviewer .imagecell {
    border-top:solid 2px black;
    text-align:center;
}

.imageviewer .controlcell {
    width:33%;
}

.imageviewer .commentlabel {
    border-top:solid 2px black;
    margin-top:10px;
    text-align:center;
}